When you add the booze, it actually cooks the eggs, or pickles them in the least. If you know where your eggs come from, it should be fine. I imagine you could heat the yolk mixture before adding the whites.
If you look at a carton of eggnog, it is mainly crap chemicals and seaweed or guar gum. Real stuff is sooo much tastier. I'll buy the freshest eggs available and take my chances.